255828 has 12 divisors (see below), whose sum is σ = 596960. Its totient is φ = 85272.

The previous prime is 255803. The next prime is 255839. The reversal of 255828 is 828552.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 255795 and 255804.

It is a congruent number.

It is an unprimeable number.

255828 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10648 + ... + 10671.

2²⁵⁵⁸²⁸ is an apocalyptic number.

It is an amenable number.

255828 is an abundant number, since it is smaller than the sum of its proper divisors (341132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

255828 is a wasteful number, since it uses less digits than its factorization.

255828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21326 (or 21324 counting only the distinct ones).

The product of its digits is 6400, while the sum is 30.

The square root of 255828 is about 505.7944246431. The cubic root of 255828 is about 63.4818184250.

The spelling of 255828 in words is "two hundred fifty-five thousand, eight hundred twenty-eight".